问题
单项选择题
细胞外液中重要的是（）
A.Na+、Cl-、HCO-3和蛋白质
B.Na+、Cl-、HCO-3
C.Na+、Cl-、HPO-3和蛋白质
D.K+、Na+、MgO-2、HPO2-3、HCO-3和蛋白质
E.Na+、H+、HPO2-3和蛋白质
答案
参考答案：A
解析：
细胞外液成分主要是Na+、Cl-、HCO-3和蛋白质。
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细胞外液中重要的是（）
A.Na+、Cl-、HCO-3和蛋白质
B.Na+、Cl-、HCO-3
C.Na+、Cl-、HPO-3和蛋白质
D.K+、Na+、MgO-2、HPO2-3、HCO-3和蛋白质
E.Na+、H+、HPO2-3和蛋白质
参考答案：A
解析：
细胞外液成分主要是Na+、Cl-、HCO-3和蛋白质。
| 根据所给信息，将选项合理配对。(有一项多余) | |
| ( )1. Nancy likes ping-pong very much. She often watches ping-pong games on TV on Sundays. She wants to play ping-pong. But she only has a ping-pong ball. ( )2. Mike is a music fan. He has a big music collection. He likes Jay Chou very much. He always listens to his songs. ( )3. My father is a teacher. He often reads books. Tomorrow is his birthday. I need a gift(礼物) for him. ( )4. Oh, my god. I can't find my backpack. It's red and black. My math book and notebook are in it. ( )5. Lily is my new friend. She is a nice girl. She lets me go to meet her family and gives me her telephone number. I need to write(写) it down.
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